N = int(input())
P = list(map(int, input().split()))
Q = [0] * N
for i in range(N):
    Q[P[i] - 1] = i
ans = []
for _ in range(N):
    for i in range(N - 1):
        if Q[i] > Q[i + 1]:
            ans.append(i + 1)
            Q[i], Q[i + 1] = Q[i + 1], Q[i]
ans.reverse()
print("Yes")
print(len(ans))
for a in ans:
    print(a)